Enemies no longer walk into deathfog, which makes killing everyone with 1 barrel on Lady Vengeance nearly impossible. I've been using 2 barrels on Lady Vengeance and using Advocate and Ryker to gain source recently, which takes much more time, is there any way we can get a newpatch%, or does anyone know of a downpatcher?

you can go back to patch 2 in resources
https://www.speedrun.com/Divinity_Original_Sin_2/resources

While you're there, you should check the discord too.